Rafting-boom pin



(No Model.) I

0. BUISSON,

WITNESSES= mama; I "q: v

I BY MW ATTORNEYS.

UNITE STATES .CYPRIAN BUISSON,

OF WABASHA, MINNESOTA.

RAFTlNG-=BOOIVI PIN.

PECIPICATION forming part of Letters Patent No. 357,365, dated February 8, 1887.

Application filed September 14, 1886. Serial No. 213,499. (No model.)

To aZZ whom it mag concern:

-Be it known that I, GYPRIAN BUISSON, of Wabasha, in the county of Wabasha and State of Minnesota, have invented a new and Improved Boom-Pin, of which the following is a full. clear, and exact description.

My invention relates to a boom-pin to be used in connection with a link or other coupling for forming rafts and booms in rivers for retaining floating logs, 8m; and theinvention consists of the special construction of the pin, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is a perspective view of two of my new boom-pins united by a link-coupling, and Fig. 2 is a plan view showing the same applied to two sticks of timber for uniting the same.

The boom-pins A are used in pairs united by a coupling, B, consistingin this instance of two united quartern links, b vb, placed one upon each pin. The pins A are each made of metal, preferably iron or steel, blunt at one end and formed with a square or flat-sided head, a. Near the blunt end is formed upon each pin a spiral flange or fin, a, which engages with the wood of the timber in which itis insertedthe timbers O O or other timbers which the pins and coupling may be used for uniting.

l The spiral fin is of very steep pitch, to leave a space, a, of the body of the pin between the coils, and by preference make one complete circuit of the pin, and the lower end of the fin is beveled to a point and terminates flush with the surface of the pin a short distance above the blunt end of the pin.

In applying my new boom-pins a hole, d, is bored in the two sticks of timber to be united, said holes being of a diameter slightly greater than the diameter of the body of the pin to be inserted. Then the pins are placed in the holes and screwed down with a key or wrench applied to the heads of the pins. The spiral fins enter the wood, and, acting like a screw, draw the pins into the timber and hold them with great security.

The pins may be easily removed by theapplication thereto of a key or wrench,and may be used an indefinite number of times.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The boom-pin A, made blunt at one end and withaheadat theother,andformed withaspiral fin, a, terminating in a sloping end or point above the blunt end of the pin, substantially as shown and described.

OYPRIAN BUISSON.

Witnesses:

JOHN BURNS, P. KILeALoN. 

